Little black chick sounds happy! We put our hen in a separate cage last night so we could watch her and really inspect her leg and foot. Again, no apparent sign of injury other than limping. So we decided to let her back with the flock after reading that simple sprains and strains would heal on their own but take longer to heal. I think the splint acts in the same way as for humans. It limits joint movement which in my mind at least, would reduce stress to the affected area. I'm just a beginner though, so I'd do as much research as you can to help you make your best choices for your situation. We will continue to check our hen, watching for signs of bumblefoot or any other potential ailments. Otherwise we'll let nature take it's course to heal on it's own. Our hen, like your chick, is happily eating, drinking and foraging with the flock. I suppose TLC, tender loving care, is doing your best, because you care! Good luck, hope you'll keep posting!